The Supreme Court ruled on Monday that the allocation of more than 200 coal blocks at the centre of a cronyism scandal was illegal.
The Supreme Court is due to decide on September 1 whether to cancel the allocations, or to impose some sort of penalty.
Shares in resource stocks fell further following a broad sell-off on Monday after the ruling, which jeopardised projects built around the blocks and threatens to exacerbate a shortage of the fuel.
"The ruling creates uncertainty and has to be resolved quickly. I hope the Supreme Court gives a clear roadmap in September," said Samir Arora, a fund Manager at Helios Capital in Singapore.
The government's awards of the blocks to steel, cement and power companies has been at the centre of a scandal Indian media has dubbed ‘Coalgate’, with the Comptroller and Auditor General report in 2012 saying the underpriced sales had cost the exchequer up to $33 billion.
Analysts said a mass cancellation of the blocks would be a worst-case scenario and add to a shortage of coal for power
SC verdict on coal blocks worries bankers
SC order on coal blocks: Rs 2-lakh-crore investments at stake
SC order on coal blocks: Rs 2-lakh-crore investments at stake
Sensex up 1.25%, posts best qtr since Sept 2009
SC verdict on coal blocks worries bankers